Republic vs. Mariano

An unlisted sickness is compensable under PD 626 if proof shows that the risk of contracting the disease is increased by the working conditions, and claims under labor and social legislation must be liberally construed in favor of the employee.

For eleven years, respondent Pedro Mariano worked at LGP Printing Press in various capacities, including machine operator, paper cutter, monotype composer, film developer, and supervisor. His employment ended in February 1994 when he could no longer work due to a heart ailment, later diagnosed as Incomplete Right Bundle Branch Block, Parkinson's disease, and hypertension.

• Employment and Ailment: Respondent Pedro Mariano was employed at LGP Printing Press from January 1983 to February 1994. He held multiple positions—machine operator, paper cutter, monotype composer, film developer, and supervisor. In February 1994, he ceased working due to a heart ailment identified as "Incomplete Right Bundle Branch Block" via electrocardiograph. He was later diagnosed with Parkinson's disease and hypertension.
• Claim and SSS Denial: Mariano filed for employee’s compensation with the SSS. The SSS denied the claim on April 15, 1997, citing a lack of causal connection between his ailment and his work as a film developer.
• ECC Remand and Dismissal: The ECC remanded the case to the SSS for additional evidence. The SSS directed Mariano to submit a clinical abstract and consultation records for hypertension. Following his submission of a medical certificate from Dr. Rogelio Mariano diagnosing Parkinson's and hypertension, the SSS elevated the records to the ECC. On October 23, 1998, the ECC dismissed the claim, finding no causal connection between Parkinson's and the working conditions, and insufficient evidence that hypertension impaired his organs to prevent gainful occupation.
• Appellate Court Reversal: The Court of Appeals reversed the ECC. It found that Mariano's exposure to toxic chemicals at the printing press was a possible cause of Parkinson's disease. It also ruled that his duties as machine operator and paper cutter, which involved physical pressure and stress from urgent deadlines, caused his hypertension.

• Non-Compensability of Parkinson's Disease: Petitioner argued that Parkinson's Disease is not listed as an occupational ailment under the implementing rules of P.D. No. 626, rendering it non-compensable.
• Lack of Increased Risk: Petitioner maintained that the evidence failed to establish that the risk of contracting Parkinson's Disease was increased by the nature of respondent's work.
• Failure to Submit Required Documents: Petitioner averred that respondent failed to submit the documents required by the ECC to support his claim for disability benefits.

• Causal Connection for Parkinson's Disease: Respondent countered that the nature of his functions at the printing press brought about the onset of Parkinson's Disease.
• Compensability of Essential Hypertension: Respondent argued that, assuming Parkinson's Disease is non-compensable, his Essential Hypertension is covered by P.D. No. 626, as the risk of contracting it was increased by his job.

• Compensability of Unlisted Disease: Whether an illness not listed as an occupational disease under the implementing rules of P.D. No. 626 is compensable.
• Causal Connection: Whether respondent sufficiently established a causal connection between his ailments (Parkinson's Disease and Essential Hypertension) and his working conditions.

• Compensability of Unlisted Disease: An unlisted sickness is compensable if proof demonstrates that the risk of contracting the disease is increased by the working conditions. Pursuant to Section 1(b), Rule III of the Rules Implementing P.D. No. 626, a sickness not listed as an occupational disease may still be compensated if the claimant shows proof that the risk of contracting it is increased by the working conditions.
• Causal Connection: The causal connection was substantially proved. Regarding Parkinson's Disease, the appellate court found that the working conditions at the printing press, specifically constant exposure to toxic chemicals like carbon disulfate, carbon monoxide, and manganese, led to the progression of the ailment; the ECC itself admitted such exposure is a possible cause. Where an ailment occurs during and in the course of employment, it is presumed that the nature of the employment caused the disease. Regarding Essential Hypertension, it is a compensable illness following established jurisprudence. The physical and emotional stress inherent in the respondent's duties—operating machines, cutting paper, and meeting tight deadlines—caused and exacerbated his hypertension, which was supported by medical certification deserving full credence. In matters of labor and social legislation, doubts are resolved liberally in favor of the worker.

• Presumption of Causation — When an ailment occurs during and in the course of employment, it is presumed that the nature of the claimant's employment is the cause of the disease. Applied to establish the compensability of respondent's Parkinson's Disease, which manifested during his employment at the printing press.
• Liberal Construction of Labor and Social Legislation — Doubts in the interpretation and application of labor and social laws are resolved liberally in favor of the worker and strictly against the employer. Applied to justify liberally construing the rules implementing P.D. No. 626 in favor of the respondent.
• Probative Value of Medical Certifications — A doctor's certification as to the nature of a claimant's disability normally deserves full credence, as no medical practitioner will issue certifications indiscriminately given the serious and far-reaching effects on claims and the professional's own interests. Applied to uphold the diagnosis of hypertension and Parkinson's Disease.

• "Compassion for them is not a dole-out, but a right." — Emphasizes the policy that strict interpretation of compensation rules should not deny assistance to qualified workers whose capabilities have been diminished by their service.
• "In matters of labor and social legislation, it is well established that doubts in the interpretation and application of the law are resolved liberally in favor of the worker and strictly against the employer." — Reiterates the governing principle in resolving claims under the Labor Code.

• Government Service Insurance System v. Gabriel — Followed. Established that hypertension and heart ailments are compensable illnesses.
• Ijares v. Court of Appeals — Followed. Held that a doctor's certification regarding a claimant's disability deserves full credence.
• Roldan v. Republic — Followed. Laid down the presumption that where an ailment occurs during and in the course of employment, the nature of the employment is presumed to be the cause.
• Government Service Insurance System v. CA — Followed. Reiterated the rule under P.D. No. 626 that for an unlisted sickness to be compensable, proof must show that the risk of contracting the disease is increased by working conditions.

• Section 1(b), Rule III, Rules Implementing P.D. No. 626 — Provides that for a sickness and resulting disability or death to be compensable, the sickness must be the result of an occupational disease listed in Annex "A" with conditions satisfied; otherwise, proof must be shown that the risk of contracting the disease is increased by the working conditions. Applied to determine the compensability of respondent's unlisted ailments.

Bellosillo, Mendoza, Austria-Martinez, Callejo, Sr.